Improve code quality and write tests

node_modules/@babel/plugin-transform-block-scoped-functions/lib/index.js

@@ -0,0 +1,72 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+function _helperPluginUtils() {
+  const data = require("@babel/helper-plugin-utils");
+
+  _helperPluginUtils = function () {
+    return data;
+  };
+
+  return data;
+}
+
+function _core() {
+  const data = require("@babel/core");
+
+  _core = function () {
+    return data;
+  };
+
+  return data;
+}
+
+var _default = (0, _helperPluginUtils().declare)(api => {
+  api.assertVersion(7);
+
+  function statementList(key, path) {
+    const paths = path.get(key);
+
+    for (const path of paths) {
+      const func = path.node;
+      if (!path.isFunctionDeclaration()) continue;
+
+      const declar = _core().types.variableDeclaration("let", [_core().types.variableDeclarator(func.id, _core().types.toExpression(func))]);
+
+      declar._blockHoist = 2;
+      func.id = null;
+      path.replaceWith(declar);
+    }
+  }
+
+  return {
+    name: "transform-block-scoped-functions",
+    visitor: {
+      BlockStatement(path) {
+        const {
+          node,
+          parent
+        } = path;
+
+        if (_core().types.isFunction(parent, {
+          body: node
+        }) || _core().types.isExportDeclaration(parent)) {
+          return;
+        }
+
+        statementList("body", path);
+      },
+
+      SwitchCase(path) {
+        statementList("consequent", path);
+      }
+
+    }
+  };
+});
+
+exports.default = _default;